Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 770 · 40 questions

How to do it in your head (Look first): A 9, 19 or 99 → round and adjust. Two close numbers → count up (or near doubles when adding). × or ÷ by 4 or 8 → double or halve; other sums → split into tens and ones.

1. 1.Half of 68 =
2. 2.332 ÷ 4 =
3. 3.Best estimate of 203 + 615? (a) 600 (b) 800 (c) 1000
4. 4.14 × 8 =
5. 5.21 × 4 =
6. 6.2 + ? = 10
7. 7.28 + 8 =
8. 8.Half of 88 =
9. 9.16² =
10. 10.213 − 192 =
11. 11.You buy a bag of mangoes for ₹21 and a pen for ₹29. You pay with a ₹100 note. How much change do you get, in rupees?
12. 12.Double 75 =
13. 13.8 + ? = 10
14. 14.Half of 116 =
15. 15.9 + 8 =
16. 16.62 − 43 =
17. 17.1010 − 983 =
18. 18.88 − 65 =
19. 19.25% of ₹110 =
20. 20.81 × 9 =
21. 21.87 + 56 =
22. 22.97 − 49 =
23. 23.Double 81 =
24. 24.A film starts at 6:30 and ends at 7:40. How many minutes long is the film?
25. 25.Best estimate of 266 + 429? (a) 900 (b) 700 (c) 500
26. 26.Half of 76 =
27. 27.42 + ? = 100
28. 28.Best estimate of 17 × 66? (a) 1400 (b) 140 (c) 14000
29. 29.Best estimate of 26 × 70? (a) 2100 (b) 210 (c) 21000
30. 30.56 + 6 =
31. 31.67 × 4 =
32. 32.You buy a notebook for ₹11 and a pen for ₹35. You pay with a ₹100 note. How much change do you get, in rupees?
33. 33.47 + ? = 100
34. 34.23² =
35. 35.78 × 6 =
36. 36.You buy a pencil box for ₹50 and pay with a ₹100 note. How much change do you get, in rupees?
37. 37.A cricket match starts at 8:45 and the first innings ends at 9:35. How many minutes did the innings last?
38. 38.19 × 8 =
39. 39.43 laddoos are packed in boxes of 9. How many laddoos are left over?
40. 40.You buy a storybook for ₹32 and a pen for ₹20. You pay with a ₹100 note. How much change do you get, in rupees?

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths